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Finding the Fourth Proportional to 12,704.20, 17,811.80 and 12,704.20

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Solution

The fourth proportional to 12,704.20, 17,811.80 and 12,704.20 is: 17,811.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,704.20 : 17,811.80 = 12,704.20 : x
  2. Step 2: Convert to fraction form
    12,704.20/17,811.80 = 12,704.20/x
  3. Step 3: Cross multiply
    12,704.20x = 17,811.80 × 12,704.20
  4. Step 4: Simplify right side
    12,704.20x = 226,284,669.56
  5. Step 5: Solve for x
    x = 226,284,669.56/12,704.20
  6. Step 6: Final answer
    x = 17,811.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.